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(1 中鐵城建集團(tuán)有限公司, 長沙 410208; 2 中鐵城建集團(tuán)北京工程有限公司, 北京 100044)

摘要: 為考慮施工過程中混凝土收縮徐變對(duì)超高層結(jié)構(gòu)豎向變形的影響,以銀川綠地中心雙子塔之一的南塔為研究對(duì)象,采用有限元軟件 ANSYS 建立南塔模型,考慮結(jié)構(gòu)自重、施工荷載以及混凝土收縮徐變的作用,對(duì)南塔進(jìn)行施工全過程模擬分析,利用生死單元技術(shù)模擬施工過程中荷載隨結(jié)構(gòu)高度的變化以及從下至上整個(gè)的施工過程,分別對(duì)外框筒、核心筒的豎向變形和豎向變形差進(jìn)行了研究,并根據(jù)豎向變形進(jìn)行了外框筒預(yù)調(diào)值及核心筒補(bǔ)償值的計(jì)算. 結(jié)果表明:外框筒、核心筒的豎向變形隨高度的增加先增大后減小,二者豎向變形差滿足施工要求;外框筒預(yù)調(diào)值及核心筒補(bǔ)償值隨結(jié)構(gòu)高度變化呈現(xiàn)“兩頭小,中間大”的變化規(guī)律. 研究成果可作為銀川綠地中心雙子塔安全施工控制方面的一項(xiàng)重要評(píng)估指標(biāo),對(duì)同類工程具有一定參考價(jià)值.

關(guān)鍵詞: 銀川綠地中心; 超高層結(jié)構(gòu); 施工全過程分析; 收縮徐變; 生死單元; 豎向變形; 預(yù)調(diào)值

中圖分類號(hào):TU352. 5 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)11-0137-06

DOI:10. 19701 / j. jzjg. 20200547

Simulation of construction whole process of super high-rise complex structure considering concrete shrinkage and creep

WANG Zhongliang1, LIU Dehui1, GUO Zhihua1, YANG Yazeng1, ZHENG Shuren2

(1 China Railway Urban Construction Group Co. , Ltd. , Changsha 410208, China;2 China Railway Urban Construction Group Beijing Engineering Co. , Ltd. , Beijing 100044, China)

Abstract: In order to consider the impact of concrete shrinkage and creep on the vertical deformation of super high-risestructures during construction, taking the south tower of the twin towers of Yinchuan Greenland Center as the researchobject, and the finite element software ANSYS was used to establish the south tower model. Considering the effect ofstructural self-weight, construction load and concrete shrinkage and creep, the construction whole process of the south towerwas simulated and analyzed. The life-and-death unit technology was used to simulate the changes in load with structuralheight during the construction process and the entire construction process from bottom to top, the vertical deformation andvertical deformation difference of the outer frame cylinder and the core cylinder were studied, and the pre-adjustment valueof the outer frame cylinder and the compensation value of the core cylinder were calculated based on the verticaldeformation. The results show that the vertical deformation of the outer frame cylinder and the core cylinder first increasesand then decreases with the increase of height, and the vertical deformation difference between the two meets theconstruction requirements. The pre-adjustment value of the outer frame cylinder and the compensation value of the corecylinder show a variation pattern of " small at both ends and large in the middle" with the change of structural height. Theresearch results can serve as an important evaluation indicator for the safety construction control of the twin towers ofYinchuan Greenland Center, and have certain reference value for similar projects.

Keywords: Yinchuan Greenland Center; super high-rise structure; construction whole process analysis; shrinkage andcreep; life-and-death unit; vertical deformation; pre-adjustment value

第一作者:王忠良,學(xué)士,高級(jí)工程師,主要從事建筑結(jié)構(gòu)研究、科技研發(fā)與工程技術(shù)管理工作,Email:2262325408@ qq. com.

[引用本文] 王忠良,劉德輝,郭智華,等. 考慮混凝土收縮徐變的超高層復(fù)雜結(jié)構(gòu)施工全過程模擬[ J]. 建筑結(jié)構(gòu),2023,53(11):137-142. WANG Zhongliang,LIU Dehui,GUO Zhihua,et al. Simulation of construction whole process ofsuper high-rise complex structure considering concrete shrinkage and creep [ J]. Building Structure, 2023, 53 ( 11):137-142.